STR_TO_DATE returns NULL with a warning in case of a correct input
in combination with ucs2, utf16, utf16le, or utf32:
MySQL [test]> set character_set_connection=ucs2; select str_to_date('2001-01-01','%Y-%m-%d');show warnings;
|
Query OK, 0 rows affected (0.00 sec)
|
|
+--------------------------------------+
|
| str_to_date('2001-01-01','%Y-%m-%d') |
|
+--------------------------------------+
|
| NULL |
|
+--------------------------------------+
|
1 row in set, 1 warning (0.00 sec)
|
|
+---------+------+-------------------------------------------------------+
|
| Level | Code | Message |
|
+---------+------+-------------------------------------------------------+
|
| Warning | 1411 | Incorrect datetime value: '' for function str_to_date |
|
+---------+------+-------------------------------------------------------+
|
1 row in set (0.00 sec)
|
The expected result is: 2001-01-01.
Note, MySQL-5.6 demonstrates the same problem.
Bug
Major
